cnn's john zarrella is following that. he's live in new orleans. john, what do we know so far. >> reporter: well, christine, we know what it's not. it's not beyonce. it's not upgrades, they don't believe, that they recently did to the electrical feeder system coming into the stadium and they say it's not likely that there was too much power being pulled inside the stadium. so what we still have this morning is a power puzzle. the night the lights went out at the super bowl is a story about, well, a few things. what went right. everyone remaining calm. >> i've never met so many people that were so hospitable. >> reporter: what happened. cbs video from inside the stadium control room shows the superdome's uh-oh moment. >> we lost lights. all right. >> going to a manual override. >> reporter: and then there's that head scratching still unanswered question, what went wrong. here's what we know, kind of. smg, the company that owns and operates the superdome says the problem originated outside the stadium. >> the truth is the interruption in service didn